Creating a DataFrame
With Spark session object, applications can create DataFrames from an existing RDD, a Hive table, or a number of data sources we mentioned earlier in Chapter 3, ELT with Spark. We have looked at creating DataFrames in our previous chapter especially from TextFiles and JSON documents. We are going to use a Call Detail Records (CDR) dataset for some basic data manipulation with DataFrames. The dataset is available from this book's website if you want to use the same dataset for your practice.
A sample of the data set looks like the following screenshot:
Figure 4.8: Sample CDRs data set
Manipulating a DataFrame
We are going to perform ...
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